En EspaŅol

Q. Who is Mr. Smarty Plants?

A: There are those who suspect Wildflower Center volunteers are the culpable and capable culprits. Yet, others think staff members play some, albeit small, role. You can torture us with your plant questions, but we will never reveal the Green Guru's secret identity.

Help us grow by giving to the Plant Database Fund or by becoming a member

Did you know you can access the Native Plant Information Network with your web-enabled smartphone?

Share

Ask Mr. Smarty Plants

Ask Mr. Smarty Plants is a free service provided by the staff and volunteers at the Lady Bird Johnson Wildflower Center.

Search Smarty Plants
    
 
See a list of all Smarty Plants questions
Can't find the answer in our existing FAQs, submit a question to Mr. Smarty Plants.
Need help with plant identification, visit the plant identification page.
 
rate this answer
Not Yet Rated

Wednesday - June 24, 2009

From: SAN ANTONIO, TX
Region: Southwest
Topic: Diseases and Disorders
Title: Why are my Spanish Oaks dropping branches that appear to be alive?
Answered by: Jimmy Mills

QUESTION:

We have two large Spanish Oaks that we planted ourselves. They both have begun to loose large branches that aren't dead. These branches just break off and fall. There is usually a wind, but not to the extent that limbs should fall off the trees. Is this a problem with these trees? Can we do anything to prevent it?

ANSWER:

This doesn't sound like a problem of the Spanish Oaks so much as it sounds like the oaks have some unwanted guests; twig girdlers. These are a type  of wood boring longhorn beetles that girdle twigs and branches and cause them to fall from the tree. Common hosts of the twig girdler include persimmon, pecan, elm, hickory, oak, honeylocust, hackberry, poplar, linden, redbud, basswood, dogwood and various fruit trees.

This Bulletin from the Texas Agricultural Extension Service describes the biology of the girdlers.

Have you examined the ends of the fallen branches? There should be some tell-tale signs if the beetles are the cause.

This article from the Alabama Agricultural Experinent Station has good illustrations of beetle damage.

My suggestion is that you get in touch with the Texas AgriLife Extension Office in Bexar County, and show them the branches. They should be able to help you with this problem by identifying the culprit and suggesting treatment.

 

 

More Diseases and Disorders Questions

Beneficial earthworms attacked by fire ants
August 04, 2006 - Is there a right way or a trick to releasing earthworms? I have a friend who has an abundance of earthworms in their soil so I took advantage of the situation. I released them in my freshly tilled gar...
view the full question and answer

Smarty Plants on arborvitaes
March 28, 2005 - Hello, I live in Allentown, PA and have a 7-foot arborvitae shrub in my backyard, planted in the corner of the yard where a wood fence intersects with the brick wall of the garage. I have had ma...
view the full question and answer

Mexican oak and red oak not looking healthy
August 02, 2014 - I purchased a Mexican oak tree and I believe a red oak tree from your center about 1 year ago. Recently I've noticed that they don't look as healthy as they have been, and I just looked at the leave...
view the full question and answer

Problems with mature cottonwood in Justin TX
September 17, 2012 - I have a very large, 90" circumference, approx 60' tall, cottonwood tree in my front yard that appears to be sick. The trunk splits at about the 4' level into 2 parts. at that split is a 10" wide...
view the full question and answer

Plants dying in circular garden in Killeen, TX.
July 31, 2012 - I have a large circular garden in my backyard out in the country in Killeen Texas. Last year two elms died. This year the Rose of Sharon has been dying one by one. One bush will completely die off bef...
view the full question and answer

Smarty Plants's Facebook profile Support the Wildflower Center by Donating Online or Becoming a Member today.

Mr. Smarty Plants wants you to be his Facebook friend. Click the Facebook icon to add yourself to Mr. Smarty Plants list of friends.
E-NEWSLETTER | BECOME A MEMBER | DONATE NOW | MEDIA | SITEMAP
© 2014 Lady Bird Johnson Wildflower Center